1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0cc0184425172f7027e4f57d5c9033c02dafa5b1af67cf587d9f210f9edea0c. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f88047f0-4aee-460c-a04c-394b460c353f.json and https://artists.proofprofile.net/proofs/artist/f88047f0-4aee-460c-a04c-394b460c353f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x887304fd97ff2b3571b2421fe9fa4069451891b15f55527283694a7a7c7cb11e. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/COC010526164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7665200163d5633cf2ee0036425bdc1504725048d3beaf9aadb716c9366641be. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US7VG1706016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e18165e4851bbc645f436451d88b83c0067fd9417a40085f7932889470ced1a. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US7VG1706020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c4729811c74a34323e416e0c64117cb6549d4b37d58b545a91a45426b520c51. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US7VG1706021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40443313671255a30f4957458dd422b93f43ae6658122cbb17722eb385476efc. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US7VG1706023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c106b3a56006c8f4b8a1177d35eebbda31772ab19ab41a7edb892ab370a0c51. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US7VG1706024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc847e7c35fa94a1d1ee1618b0b303c0253e00dc50521483dabccdf0b06074de8. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US7VG1705939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab17e687de0620f39031892ee7c1b187e6c192c98335e5a3fbb6ae0bf87d518c. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US7VG1705940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x664a59519260821d37187f05eb271c2f832603f72ddca8f48e6d76ed3ee6c5f0. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/COC011229157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2abd81a7d44c39ed66e7a6628cff4cffe0f97c46b16127a801819fecb0806e91. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US7VG1705928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7423c6d2f7b604d97109ecdbab7897183a6afdef5f5e40eeb20c35317bb0f7fb. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US7VG1720391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70aecd746a211fb903724aeda5f47385dfdb1b15104ce88558fb0684e7e05b31. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US7VG1720398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x875959a47ac275d0ab5476eb6ab27d3580cd6777eaad7e5dd43ff2660dd07ef9. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US7VG1720400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a627d3c1a627fa92e80c249a42a663554b6a5a42975daae64c4064b400861eb. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US7VG1742749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f0c554e32df5e2e3b590ea961a14666b2a2eeb6b068ecb1d4d843fbb4134de7. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US7VG1742750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d5e94cd4c0b1b446a7330178323a437b5bb2af6b31047448d5d0a4c97e4c1bd. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US7VG1742768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a5e2f413a6880d73d2406641612bbc2008471174f0be44259bd504431cb2e77. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZMZ92097752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d41d4bea382b0a0562df6d631c0cfe15c42dcab7ce78b2d794cb26dec51a767. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZMZ92097755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7676b25707d281ffd9d60b52b9068ef1c3d56427d0a328d7ddd2c2e10c699897. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZMZ92097757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3754c6aa90d2c2dcd4dd02eccbd59cbcf99c5b986a1acb78d535b6f0ea5941fd. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZMZ92097762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67fd85694b54c5a377241c2823794c693844d7c09f8ba760701697555be0394b. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZMZ92097764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebfd7645f7f5b031716ebf6d7346f2270e67e19bd95b1451f90ad7e694830153. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZMZ92097766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4301691a8061c166112d48a6a8772a8d36fd3909aa61a00896fda553ed3a9130. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZMZ92097771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0151462cb8a596337e0114c5c05525574ea0c759286ea21db53b9ddb900053c. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZMZ92097775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42ae5c7924131b776ca40851d246ea51e3581132e54f9ad96f7e360b5c3d2d0b. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZMZ92097778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddda9b9bbed746f95aac15ed048f315ce879386b4f2e83a604bd95995329bf27. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZMZ92097782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb596407f43fb84ab908223c58ba6ac1312ce223d982eb0ba9a082f1d9966991a. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZMZ92386613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d79ecd9ae295de0076c789d63fef7df30aa15b2a253d5aa577e6ef5264636ac. Chain 2 (Bitcoin): anchored in block 958369 (2026-07-17T05:20:29Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZGLS2435346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96c29332127df44abc88d7d1a220c06d639f6965d139d5e7ba165e23029c24e1. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTVM2488999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x567b57eeccd02aa2b7078ef76161fc3f22bfa491b82e6964bea2f988eca862ee. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMFME2322400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca8b5ed26857f5937d26ec15d927823655f85420c1ac60c31f3d716589242200. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRX872359878.